ath9k: Remove has_hw_phycounters

PHY counters are available in all chipsets supported
by ath9k. Remove the check.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.h

@@ -507,7 +507,6 @@ struct ath_hw {
 
 	/* ANI */
 	u32 proc_phyerr;
-	bool has_hw_phycounters;
 	u32 aniperiod;
 	struct ar5416AniState *curani;
 	struct ar5416AniState ani[255];